Is it worth to keep a MIDP 1.0 version of your product? I found out that the answer is yes and will share the reasons.
The latest verstion of my chess board - 1.7 - requires MIDP 2.0 and minimum screen resolution of 128x96. The previous version - 1.6 - required the same minimum screen resolution, but MIDP 1.0 instead.
I could delete 1.6 and focus only on newer handsets, but got curious about how many downloads this older version would get against the new one.
GetJar has download stats reports: daily, weekly and monthly. I got daily reports for 1.6 and 1.7 since April, 12 and was surprised to see that MIDP 1.0 downloads were 20% of the total - 389 out of 1889.
Below is a graphic with the daily download evolution of both versions: